Illinois Administrative Code (Last Updated: March 27, 2024)

§301.411. Total Maximum Daily Load

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"Total Maximum Daily Load" or "TMDL" is the sum of the individual wasteload allocations for point sources and load allocations for nonpoint sources and natural background, as more fully defined at 40 CFR 130.2(i). A TMDL sets and allocates the maximum amount of a pollutant that may be introduced into a water body and still assure attainment and maintenance of water quality standards.

(Source: Amended at 47 Ill. Reg. 4415, effective March 23, 2023)

                    
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